User's Guide Solving Problems regain normal scanning speed, leave the ADF idle for at least 30 minutes. Scanning speed does not recover if the power is off. The Date and Time Are Incorrect Set the date and the time correctly on the control panel. After a power failure caused by a lightning strike or if the power is left off for a long time, the clock may show the wrong time. Related Information & “ Setup Mode” on page 20 Application Is Blocked by a Firewall (for Windows Only) Add the application to the Windows Firewall allowed program in security settings on the Control Panel . 140